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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_CONTEXTUAL_CUEING_CONTEXTUAL_CUEING_HELPER_H_
#define CHROME_BROWSER_CONTEXTUAL_CUEING_CONTEXTUAL_CUEING_HELPER_H_
#include <optional>
#include "base/memory/weak_ptr.h"
#include "base/observer_list.h"
#include "base/time/time.h"
#include "base/types/expected.h"
#include "chrome/browser/contextual_cueing/contextual_cueing_enums.h"
#include "components/optimization_guide/core/hints/optimization_guide_decision.h"
#include "content/public/browser/web_contents_observer.h"
#include "content/public/browser/web_contents_user_data.h"
class OptimizationGuideKeyedService;
namespace tabs {
class GlicNudgeController;
} // namespace tabs
namespace contextual_cueing {
class ContextualCueingService;
class ScopedNudgeDecisionRecorder;
class ContextualCueingHelper
: public content::WebContentsObserver,
public content::WebContentsUserData<ContextualCueingHelper> {
public:
// Creates ContextualCueingHelper and attaches it the `web_contents` if
// contextual cueing is enabled.
static void MaybeCreateForWebContents(content::WebContents* web_contents);
ContextualCueingHelper(const ContextualCueingHelper&) = delete;
ContextualCueingHelper& operator=(const ContextualCueingHelper&) = delete;
~ContextualCueingHelper() override;
// content::WebContentsObserver:
void DidFinishNavigation(
content::NavigationHandle* navigation_handle) override;
void PrimaryMainDocumentElementAvailable() override;
void OnFirstContentfulPaintInPrimaryMainFrame() override;
void DocumentOnLoadCompletedInPrimaryMainFrame() override;
// Returns when the last primary main frame navigation was committed if the
// navigation was a same document navigation.
std::optional<base::TimeTicks> last_same_doc_navigation_committed() const {
return last_same_doc_navigation_committed_;
}
// Returns whether the last primary main frame navigation that was committed
// has already past FCP.
bool has_first_contentful_paint() const {
return has_first_contentful_paint_;
}
tabs::GlicNudgeController* GetGlicNudgeController();
private:
ContextualCueingHelper(content::WebContents* contents,
OptimizationGuideKeyedService* ogks,
ContextualCueingService* ccs);
// Called when optimization guide metadata is received.
void OnOptimizationGuideCueingMetadata(
base::TimeTicks document_available_time,
optimization_guide::OptimizationGuideDecision decision,
const optimization_guide::OptimizationMetadata& metadata);
void OnCueingDecision(
std::unique_ptr<ScopedNudgeDecisionRecorder> decision_recorder,
base::TimeTicks document_available_time,
base::expected<std::string, NudgeDecision> decision_result);
bool IsBrowserBlockingNudges(ScopedNudgeDecisionRecorder* recorder);
// When the last same doc navigation was committed.
std::optional<base::TimeTicks> last_same_doc_navigation_committed_;
bool has_first_contentful_paint_ = false;
// Not owned and guaranteed to outlive `this`.
raw_ptr<OptimizationGuideKeyedService> optimization_guide_keyed_service_ =
nullptr;
// Not owned and guaranteed to outlive `this`.
raw_ptr<ContextualCueingService> contextual_cueing_service_ = nullptr;
base::WeakPtrFactory<ContextualCueingHelper> weak_ptr_factory_{this};
friend WebContentsUserData<ContextualCueingHelper>;
WEB_CONTENTS_USER_DATA_KEY_DECL();
};
} // namespace contextual_cueing
#endif // CHROME_BROWSER_CONTEXTUAL_CUEING_CONTEXTUAL_CUEING_HELPER_H_
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